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Nearby · Delaware Co.
Groundhog (Marmota (Marmota) monax)
(c) Mike Leveille, some rights reserved (CC BY-NC), uploaded by Mike Leveille · CC BY-NC 4.0 (opens in a new tab) · iNaturalist (opens in a new tab)
MammalsIn Delaware County, Ohio

Groundhog

Marmota (Marmota) monax (Linnaeus, 1758)

Groundhog in all of Ohio
Kingdom
Animalia
Phylum
Chordata
Class
Mammalia
Order
Rodentia
Family
Sciuridae
Genus
Marmota
Near Delaware County

Range

Where it is recorded

Season shown in 1 of Ohio's 88 counties. Its mapped range covers 88. Explore Ohio

  • No result yet (0)
  • Within its mapped range (10)
  • Recorded, too few records for a result (57)
  • Recorded, season not shown (20)
  • Season shown (1)
Boundaries: U.S. Census Bureau, 2025 Cartographic Boundary Files, 1:500,000. Range: USGS Gap Analysis Project, Species Range Maps CONUS_2001 (2018). Show as a table
Counties as a table
Groundhog by Ohio county: records and mapped range
CountyRecordsIn mapped range
Adams CountyRecorded, too few records for a resultYes: year-round
Allen CountyRecorded, too few records for a resultYes: year-round
Ashland CountyRecorded, too few records for a resultYes: year-round
Ashtabula CountyRecorded, too few records for a resultYes: year-round
Athens County80 · Recorded, season not shownYes: year-round
Auglaize CountyRecorded, too few records for a resultYes: year-round
Belmont CountyRecorded, too few records for a resultYes: year-round
Brown CountyRecorded, too few records for a resultYes: year-round
Butler County35 · Recorded, season not shownYes: year-round
Carroll CountyRecorded, too few records for a resultYes: year-round
Champaign CountyRecorded, too few records for a resultYes: year-round
Clark CountyRecorded, too few records for a resultYes: year-round
Clermont CountyRecorded, too few records for a resultYes: year-round
Clinton CountyNo qualifying records yetYes: year-round
Columbiana CountyRecorded, too few records for a resultYes: year-round
Coshocton CountyRecorded, too few records for a resultYes: year-round
Crawford CountyRecorded, too few records for a resultYes: year-round
Cuyahoga County217 · Season shownYes: year-round
Darke CountyRecorded, too few records for a resultYes: year-round
Defiance CountyRecorded, too few records for a resultYes: year-round
Delaware County24 · Recorded, season not shownYes: year-round
Erie County62 · Recorded, season not shownYes: year-round
Fairfield CountyRecorded, too few records for a resultYes: year-round
Fayette CountyRecorded, too few records for a resultYes: year-round
Franklin County130 · Recorded, season not shownYes: year-round
Fulton CountyRecorded, too few records for a resultYes: year-round
Gallia CountyRecorded, too few records for a resultYes: year-round
Geauga CountyRecorded, too few records for a resultYes: year-round
Greene County25 · Recorded, season not shownYes: year-round
Guernsey CountyRecorded, too few records for a resultYes: year-round
Hamilton County71 · Recorded, season not shownYes: year-round
Hancock CountyRecorded, too few records for a resultYes: year-round
Hardin CountyRecorded, too few records for a resultYes: year-round
Harrison CountyRecorded, too few records for a resultYes: year-round
Henry CountyRecorded, too few records for a resultYes: year-round
Highland CountyRecorded, too few records for a resultYes: year-round
Hocking CountyRecorded, too few records for a resultYes: year-round
Holmes CountyRecorded, too few records for a resultYes: year-round
Huron CountyNo qualifying records yetYes: year-round
Jackson CountyNo qualifying records yetYes: year-round
Jefferson CountyRecorded, too few records for a resultYes: year-round
Knox County21 · Recorded, season not shownYes: year-round
Lake County39 · Recorded, season not shownYes: year-round
Lawrence CountyRecorded, too few records for a resultYes: year-round
Licking County24 · Recorded, season not shownYes: year-round
Logan County50 · Recorded, season not shownYes: year-round
Lorain County30 · Recorded, season not shownYes: year-round
Lucas County117 · Recorded, season not shownYes: year-round
Madison CountyRecorded, too few records for a resultYes: year-round
Mahoning CountyRecorded, too few records for a resultYes: year-round
Marion CountyRecorded, too few records for a resultYes: year-round
Medina County22 · Recorded, season not shownYes: year-round
Meigs CountyRecorded, too few records for a resultYes: year-round
Mercer CountyRecorded, too few records for a resultYes: year-round
Miami CountyRecorded, too few records for a resultYes: year-round
Monroe CountyRecorded, too few records for a resultYes: year-round
Montgomery County39 · Recorded, season not shownYes: year-round
Morgan CountyNo qualifying records yetYes: year-round
Morrow CountyRecorded, too few records for a resultYes: year-round
Muskingum CountyRecorded, too few records for a resultYes: year-round
Noble CountyNo qualifying records yetYes: year-round
Ottawa County23 · Recorded, season not shownYes: year-round
Paulding CountyNo qualifying records yetYes: year-round
Perry CountyNo qualifying records yetYes: year-round
Pickaway CountyRecorded, too few records for a resultYes: year-round
Pike CountyNo qualifying records yetYes: year-round
Portage County67 · Recorded, season not shownYes: year-round
Preble CountyRecorded, too few records for a resultYes: year-round
Putnam CountyRecorded, too few records for a resultYes: year-round
Richland CountyRecorded, too few records for a resultYes: year-round
Ross CountyRecorded, too few records for a resultYes: year-round
Sandusky CountyNo qualifying records yetYes: year-round
Scioto CountyRecorded, too few records for a resultYes: year-round
Seneca CountyRecorded, too few records for a resultYes: year-round
Shelby CountyRecorded, too few records for a resultYes: year-round
Stark County72 · Recorded, season not shownYes: year-round
Summit County160 · Recorded, season not shownYes: year-round
Trumbull CountyRecorded, too few records for a resultYes: year-round
Tuscarawas CountyRecorded, too few records for a resultYes: year-round
Union CountyRecorded, too few records for a resultYes: year-round
Van Wert CountyRecorded, too few records for a resultYes: year-round
Vinton CountyNo qualifying records yetYes: year-round
Warren CountyRecorded, too few records for a resultYes: year-round
Washington CountyRecorded, too few records for a resultYes: year-round
Wayne County23 · Recorded, season not shownYes: year-round
Williams CountyRecorded, too few records for a resultYes: year-round
Wood CountyRecorded, too few records for a resultYes: year-round
Wyandot CountyRecorded, too few records for a resultYes: year-round

Season

When it is recorded

In Delaware County

Not enough evidence

The weeks are still too uncertain to show a season. Based on 24 records in 8 of the 10 years from 2016 to 2025, above the minimum of 20 records from 5 different years.
Show over the bars
Recording in Delaware County · records of all species each week, 21,087 in all

Records per week from 24 records in 8 of the 10 years from 2016 to 2025. Shows when people recorded it, not a season or how common it is.

Show as a table
Records of Groundhog in Delaware County each week, and records of all species
WeekRecords of GroundhogYears recordedRecords of all species
Jan 4–100075
Jan 11–170035
Jan 18–240037
Jan 25–310028
Feb 1–70033
Feb 8–140056
Feb 15–210038
Feb 22–280036
Mar 1–70073
Mar 8–1400118
Mar 15–2100111
Mar 22–2800120
Mar 29 – Apr 411208
Apr 5–1111304
Apr 12–1800810
Apr 19–2511622
Apr 26 – May 200561
May 3–922539
May 10–1611620
May 17–2311560
May 24–3000640
May 31 – Jun 600751
Jun 7–1300746
Jun 14–2000593
Jun 21–2711623
Jun 28 – Jul 411725
Jul 5–1111597
Jul 12–1822785
Jul 19–2521848
Jul 26 – Aug 111646
Aug 2–800665
Aug 9–1511612
Aug 16–2200684
Aug 23–2900775
Aug 30 – Sep 500782
Sep 6–12111,111
Sep 13–1922827
Sep 20–2611663
Sep 27 – Oct 322686
Oct 4–1011576
Oct 11–1700411
Oct 18–2400350
Oct 25–3100245
Nov 1–700181
Nov 8–1411112
Nov 15–2100101
Nov 22–280093
Nov 29 – Dec 50055
Dec 6–120039
Dec 13–190056
Dec 20–260039
Dec 27 – Jan 20086

In Ohio

Late March to mid-October, middle week Jun 28 – Jul 4

Show over the bars
Recording in Ohio · records of all species each week, 1,691,199 in all

Records per week from 2,227 records in 10 of the 10 years from 2016 to 2025. Shows when people recorded it, not how common it is. The grey bars show how many records of all species were made here each week, so you can see when recording itself was high or low; the season is not adjusted by them.

Recorded on 1,223 dates. Latest record: December 2025.

Show as a table
Records of Groundhog in Ohio each week, and records of all species
WeekRecords of GroundhogYears recordedRecords of all species
Jan 4–10116,211
Jan 11–17005,146
Jan 18–24004,645
Jan 25–31114,698
Feb 1–7116,023
Feb 8–14225,888
Feb 15–21225,436
Feb 22–28536,846
Mar 1–71158,321
Mar 8–1418710,384
Mar 15–2119512,620
Mar 22–2835713,949
Mar 29 – Apr 434819,661
Apr 5–1152926,860
Apr 12–1869839,925
Apr 19–2557941,623
Apr 26 – May 2951056,391
May 3–984952,952
May 10–16941053,785
May 17–23761057,698
May 24–3090954,651
May 31 – Jun 671953,099
Jun 7–1388953,700
Jun 14–20711056,625
Jun 21–2775855,361
Jun 28 – Jul 4771058,477
Jul 5–1183961,336
Jul 12–18791064,722
Jul 19–2579969,753
Jul 26 – Aug 165859,416
Aug 2–8711059,712
Aug 9–1551855,994
Aug 16–2265954,328
Aug 23–2956951,772
Aug 30 – Sep 555957,167
Sep 6–1269959,075
Sep 13–1963954,543
Sep 20–2669645,860
Sep 27 – Oct 347843,180
Oct 4–10651037,841
Oct 11–1757830,824
Oct 18–24361021,156
Oct 25–3124819,021
Nov 1–727814,172
Nov 8–1420712,621
Nov 15–21427,965
Nov 22–28328,136
Nov 29 – Dec 5446,083
Dec 6–12336,004
Dec 13–19325,423
Dec 20–26115,661
Dec 27 – Jan 2008,459

What these results show

These results show when people recorded a species, not when or where it occurs. Missing weeks and low counts do not mean absence or scarcity, and counts are not abundance. Contributed records reflect where, when and what people chose to observe.

Identification

How to identify it

Often confused with

  • Muskrat Ondatra zibethicus111 identifications worldwide named one where the other was meant
  • American Beaver Castor canadensis79 identifications worldwide named one where the other was meant
  • Common Raccoon Procyon lotor40 identifications worldwide named one where the other was meant
  • Eastern Gray Squirrel Sciurus (Sciurus) carolinensis24 identifications worldwide named one where the other was meant
  • Virginia Opossum Didelphis virginiana18 identifications worldwide named one where the other was meant

From iNaturalist’s similar-species counts, refreshed monthly: confusions in Ohio first, then worldwide. Only species with an Ohio result are listed.

Land cover where it is recorded

Land coverIts recordsAll Ohio records
Developed74%49%
Forest12%31%
Farmland9%11%
Wetland4%5%
Open water1%3%
Barren0.4%0.6%
Grassland and shrub0.3%0.9%

From 1,236 records placed within 100 m, beside all Ohio records placed the same way. People record where they go, so this shows where records come from, not where the species lives. Land cover: USGS Annual NLCD, 2025 (opens in a new tab)

Sources

Where these results come from

  • Records from iNaturalist research-grade observations and expert-identified GBIF datasets, CC0, CC BY and CC BY-NC. Sources
  • Seasons use the published method and its evidence thresholds. Methods
  • See it on iNaturalist (opens in a new tab)OpenPhenology is independent and not affiliated with iNaturalist.

Records behind the Ohio result

2,227 records from 3 datasets.

  • iNaturalist Research-grade Observations (opens in a new tab) · iNaturalist.org · 2,210 recordsiNaturalist contributors, iNaturalist (2026). iNaturalist Research-grade Observations. iNaturalist.org. Occurrence dataset https://doi.org/10.15468/ab3s5x accessed via GBIF.org on 2026-11-13.
  • iNaturalist observations (opens in a new tab) · iNaturalist.org · 16 recordsiNaturalist. Available from https://www.inaturalist.org. Accessed 2026-11-13
  • Roadkill (opens in a new tab) · University of Natural Resources and Life Sciences, Vienna · 1 recordUniversity of Natural Resources and Life Sciences, Vienna (2024). Roadkill. Occurrence dataset https://doi.org/10.15468/ejb47y accessed via GBIF.org on 2026-11-13.

To cite: the GBIF downloads doi:10.15468/dl.8m7c3d (opens in a new tab), doi:10.15468/dl.y2jkt8 (opens in a new tab).

A spreadsheet (CSV) with a link to each record, on iNaturalist or GBIF. Records whose location was hidden by the observer or the source are counted but not linked.